Huysseune A, Sire J Y
Zoological Institute, University of Ghent, Belgium.
Eur J Oral Sci. 1998 Jan;106 Suppl 1:437-81. doi: 10.1111/j.1600-0722.1998.tb02211.x.
The evolutionary links that exist between odontodes and organs that are phylogenetically related to them (teeth and scales) suggest the use of comparative approaches to study these structures. Part one of this review briefly introduces current ideas on how the pattern of odontodes and odontode-derived tissues has been established during evolution to yield the diversity of odontode-related organs currently observed in nature in the cranial and postcranial skeleton. This introductory survey is used to highlight aspects of the developmental processes underlying the formation of some of these organs and the resemblance their development bears to odontogenesis. Part two provides a concise survey of the diversity of tooth structure in the different classes of extant vertebrates, in particular with reference to enamel/enameloid and dentine structure, and tooth attachment. Against this background, the current state of knowledge is reviewed with regard to developmental mechanisms involved in non-mammalian odontogenesis. Common structure and similarities in development demonstrate that teeth and odontode derivatives should not be considered subjects of separate lines of research. On the contrary, results acquired in one of these fields are relevant to the other and may disclose model species that are relevant to studies on mammalian odontogenesis.
牙质小体与在系统发育上与其相关的器官（牙齿和鳞片）之间存在的进化联系，表明可采用比较方法来研究这些结构。本综述的第一部分简要介绍了当前关于牙质小体和牙质小体衍生组织的模式在进化过程中是如何形成的观点，从而产生了目前在自然界中观察到的颅部和颅后骨骼中与牙质小体相关器官的多样性。这一介绍性概述旨在突出这些器官形成过程中发育过程的各个方面，以及它们的发育与牙发生的相似之处。第二部分简要概述了现存不同类脊椎动物牙齿结构的多样性，特别是关于釉质/类釉质和牙本质结构以及牙齿附着情况。在此背景下，回顾了关于非哺乳动物牙发生所涉及的发育机制的当前知识状态。共同的结构和发育上的相似性表明，牙齿和牙质小体衍生物不应被视为独立研究领域的对象。相反，在这些领域之一中获得的结果与另一个领域相关，并且可能揭示与哺乳动物牙发生研究相关的模式物种。
